Brush-holding stud.



T. L. 62 M. J. KEARNEY. BRUSH HOLDING STUD.

APPLICATION FILED FEB. 10. 1908 Patented Aug. 10,1909.

fiaiizasz.

THOMAS L. KEARNEY AND MICHAEL J. KEARNEY, OF OARBONDALE,

PENNSYLVANIA.

BRUSH-HOLDING STUD.

Specification of Letters Patent.

Patented Aug. 10, 1909.

Application filed February 10, 1908. Serial No. 415,243.

To all whom it may concern:

Be it known that we, THOMAS L. KEAR- NEY and MICHAEL J. KEARNEY,citizens of the United States, residing at- Carbondale, in the county ofL ckawanna and State of Pennsylvania, have invented new and use fulImprovements in Brush-Holding Studs, of which the following is aspecification.

This invention relates to an improved stud for securing a brush-holderto its support and is designed more especially for use in railwaymotors, although it is to be understood that the invention is notlimited in this connection but may be used with other forms of dynamoelectric machines.

In railway motors, as ordinarily constructed, the brush-holders aremounted on studs that are attached to a ring or adjustable supportwhereby any brusa-holder can be brought opposite a hand opening in theiuclosing casing for the motor to enable access to any particularbrush-holder or brushes in case of trouble. The studs are connected tothe supporting ring in such a manner that in case of a ground or othertrouble necessitating removal of a brush holder, the entire motor has tobe removed from the car to permit the repairsman to take off thebrush-holder for repair or re newal. This is not only a tedious and etcpensive operation but requires the car to be temporarily thrown out ofcommission. A further objection resides in the factthat tl e studs,being of metal, are liable to become grounded on the metal body of thebrush-holder in case of wear of the insulating bushing between them, orother causes.

The present invention has for its main object to overcome the objectionsabove set forth by providing a stud which is comparatively simple,inexpensive and substantial construction and so designed as to permit abrush-holder to be quickly and readily removed from its support withouttaking down the motor and at the same time possessing the desirablefeature of preventing grounding between the stud and body of thebrush-holder.

A further object of the invention is the provision of a brush-holderstud which consists of a body or supporting section of in sulationfitted to the brush holder, and an attaching section for securing thestud to the usual supporting ring, there being a de tachable connectionbetween the sections whereby the brush-holder and body portion of thestud can be removed together without disturbing the attaching section.

Another objectof the invention is to provide a brush-holding stud madeof insulating material so that danger of a ground is absolutelyprevented, the stud having one extremity equipped with an attachingdevice suitably remote from the brush-holder so that grounding isminimized.

lVith these objects in view and others, as will appear as thedescription proceeds, the invention comprises the various novel featuresof construction and arrangement of parts which will be more fullydescribed hereinafter and 'setforth with particularity in the claimsappended hereto.

In the accompanying drawing, which illustrates one of the embodiments ofthe invention, Figure 1 is a perspective View of the improved studapplied to a brushholder. Fig. 2 is a longitudinal sectional view of thestud. Fig. 3 is a perspective view of the attaching device or inner section of the stud.

Similar reference characters are employed to designate correspondingparts throughout the. several views.

Referring to the drawing, Pa designates the body of a bruslrholder ofstanda d de sign, the brush and lead connector being removed. andapplied to the body is the iniprovcd stud. This stud consists of a bodyor supporting section 1 made of suitable insulating fiber and possessingsullicient strength to support the holder. The section 1 has anelliptical or non-circul r head 2 which corre aids to the opening of theholder and into which the head has a forced fit so as to prevent lateraldisplaccn'icnt, while the particular shape of the head prevents relativeturning between the holder and stud. The section 1 projects from oneside of the brush-holder and on the extremity thereof is an attachingdevice or metal. section a the latter being removed from thebrush-holder at such a distance that danger of grounding is practicallyovercome. In the present instance. the section 1 is formed with arectangular tongue 5 that snugly tits in recess formed in the head T ofthe attaching device 4-, the recess being open at one side of the headfor permitting the sections to be disconnected by a relative movement ina plane transverse to the axis of the stud. The tongue 5 is providedwith an aperture 8 that registers with apertures 9 in the opposite wallsof the head, and through these apertures extends a bolt or otherfastening device 10 whereby the sections are detachably connected.Formed on the head is a threaded stud or shank 11 which is adapted toextend through an opening in the usual supporting ring for thebrush-holder, the said shank receiving a nut for firmly holding the studon the ring.

In practice, the two sections 1 and i of the stud are assembled on thebrush-holder and supporting ring respectively, and then the parts of thestud are fitted together and secured in place by the bolt 10. After themotor is once installed and some trouble occurs to the brushes orbrush-holder, it is an extremely simple matter to remove thebrush-holder without dismantling or taking down the motor, it beingmerely necessary to remove the bolt 10 and lift out the brush holderwith the section 1 of the stud attached thereto. The re olacing of thebrushholder is as readily accomplished so that great time and expensecan be saved and trouble reduced to a minimum.

From the foregoing description, taken in connection with theaccompanying drawing, the advantages or" the construction and of the mthod of operation will be readily apparent to those skilled in the artto which the invention appertains, and while we have described theprinciple of operation of the invention, together with the device whichwe now consider to be the best embodiment thereof, we desire to have itunderstood the device shown is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claims.

Having thus described the invention, what we claim is 1. A brush-holderstud of insulation that formed with a iiat tongue at one end, anattachmg device having a recess into which the tongue is fitted, and atastening passing through the device and tongue for removably securingthe parts together.

2. The combination of a brush holder, a stud of insulation securedthereto and have ing a portion projecting from one side of the brushholder and having a tongue extending longitudinally from the projectingportion, and an attaching device provided with a recess shaped tocorrespond witl the tongue and into which the tongue is fitted, saidtongue being of greater transverse dimension in one direction than inanother direction for preventing turning in the socket.

3. The combination of a brush holder having an opening of greatertransverse dimension in one direction than in another, a stud ofinsulation of corresponding cross sectional dimensions with the openingto snugly tit therein, an attaching device removabiy secured to one endor the stud, and a bolt passing through the stud and device forfastening the parts together.

i a J i 11 a t- 1. .1. brush no t e1 stud or insu anon formed with aneccentric portion extremity at one end and a rectanguiar tongue at theother end, metallic attachin means consisting of a head provided with arectangular recess open at the end and side of the head for receivingthe tongue, a fastening ior securing the tongue in the r cess, and athreaded shank on the attachi g means.

In testimony whereof we atnx our signatures in presence of twowitnesses.

THUifiAS L. KEARNEY.

HAEL J. KEARH Witnesses JOHN L. Fnnrcnnn, C. BnADwAY.

